michael@0: # This Source Code Form is subject to the terms of the Mozilla Public
michael@0: # License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0: # file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0: 
michael@0: # Generates tables of background images which correspond with border images for
michael@0: # creating reftests. Input is the filename containing input defined below (a subset
michael@0: # of the allowed CSS border properties). An html representation of a table is
michael@0: # output to stdout.
michael@0: #
michael@0: # Usage: python gen-refs.py input_filename
michael@0: #
michael@0: # Input must take the form (order is not important, nothing is optional, distance in order top, right, bottom, left):
michael@0: # width: p;
michael@0: # height: p;
michael@0: # border-width: p;
michael@0: # border-image-source: ...;
michael@0: # border-image-slice: p p p p;
michael@0: # note that actually border-image-slice takes numbers without px, which represent pixels anyway (or at least coords)
michael@0: # border-image-width: np np np np;
michael@0: # border-image-repeat: stretch | repeat | round;
michael@0: # border-image-outset: np np np np;
michael@0: #
michael@0: # where:
michael@0: # p ::= n'px'
michael@0: # np ::= n | p
michael@0: #
michael@0: # Assumes there is no intrinsic size for the border-image-source, so uses
michael@0: # the size of the border image area.
michael@0: 
michael@0: import sys
michael@0: 
michael@0: class Point:
michael@0:   def __init__(self, w=0, h=0):
michael@0:     self.x = w
michael@0:     self.y = h
michael@0: class Size:
michael@0:   def __init__(self, w=0, h=0):
michael@0:     self.width = w
michael@0:     self.height = h
michael@0: class Rect:
michael@0:   def __init__(self, x=0, y=0, x2=0, y2=0):
michael@0:     self.x = x
michael@0:     self.y = y
michael@0:     self.x2 = x2
michael@0:     self.y2 = y2
michael@0:   def width(self):
michael@0:     return self.x2 - self.x
michael@0:   def height(self):
michael@0:     return self.y2 - self.y
michael@0: 
michael@0: class Props:
michael@0:   def __init__(self):
michael@0:     self.size = Size()
michael@0: 
michael@0: class np:
michael@0:   def __init__(self, n, p):
michael@0:     self.n = n
michael@0:     self.p = p
michael@0: 
michael@0:   def get_absolute(self, ref):
michael@0:     if not self.p == 0:
michael@0:       return self.p
michael@0:     return self.n * ref
michael@0: 
michael@0: def parse_p(tok):
michael@0:   if tok[-2:] == "px":
michael@0:     return float(tok[:-2])
michael@0:   print "Whoops, not a pixel value " + tok
michael@0: 
michael@0: def parse_np(tok):
michael@0:   if tok[-2:] == "px":
michael@0:     return np(0, float(tok[:-2]))
michael@0:   return np(float(tok), 0)
michael@0: 
michael@0: def parse(filename):
michael@0:   f = open(filename, "r")
michael@0:   props = Props()
michael@0:   for l in f:
michael@0:     l = l.strip()
michael@0:     if not l[-1] == ";":
michael@0:       continue
michael@0:     toks = l[:-1].split()
michael@0:     if toks[0] == "border-width:":
michael@0:       props.width = parse_p(toks[1])
michael@0:     if toks[0] == "height:":
michael@0:       props.size.height = parse_p(toks[1])
michael@0:     if toks[0] == "width:":
michael@0:       props.size.width = parse_p(toks[1])
michael@0:     if toks[0] == "border-image-source:":
michael@0:       props.source = l[l.find(":")+1:l.rfind(";")].strip()
michael@0:     if toks[0] == "border-image-repeat:":
michael@0:       props.repeat = toks[1]
michael@0:     if toks[0] == "border-image-slice:":
michael@0:       props.slice = map(parse_p, toks[1:5])
michael@0:     if toks[0] == "border-image-width:":
michael@0:       props.image_width = map(parse_np, toks[1:5])
michael@0:     if toks[0] == "border-image-outset:":
michael@0:       props.outset = map(parse_np, toks[1:5])
michael@0:   f.close()
michael@0:   return props
michael@0: 
michael@0: # the result of normalisation is that all sizes are in pixels and the size,
michael@0: # widths, and outset have been normalised to a size and width - the former is
michael@0: # the element's interior, the latter is the width of the drawn border.
michael@0: def normalise(props):
michael@0:   result = Props()
michael@0:   result.source = props.source
michael@0:   result.repeat = props.repeat
michael@0:   result.width = map(lambda x: x.get_absolute(props.width), props.image_width)
michael@0:   outsets = map(lambda x: x.get_absolute(props.width), props.outset)
michael@0:   result.size.width = props.size.width + 2*props.width + outsets[1] + outsets[3]
michael@0:   result.size.height = props.size.height + 2*props.width + outsets[0] + outsets[2]
michael@0:   result.slice = props.slice
michael@0:   for i in [0,2]:
michael@0:     if result.slice[i] > result.size.height:
michael@0:       result.slice[i] = result.size.height
michael@0:     if result.slice[i+1] > result.size.width:
michael@0:       result.slice[i+1] = result.size.width
michael@0: 
michael@0:   return result
michael@0: 
michael@0: def check_parse(props):
michael@0:   if not hasattr(props, 'source'):
michael@0:     print "missing border-image-source"
michael@0:     return False
michael@0:   if not hasattr(props.size, 'width'):
michael@0:     print "missing width"
michael@0:     return False
michael@0:   if not hasattr(props.size, 'height'):
michael@0:     print "missing height"
michael@0:     return False
michael@0:   if not hasattr(props, 'width'):
michael@0:     print "missing border-width"
michael@0:     return False
michael@0:   if not hasattr(props, 'image_width'):
michael@0:     print "missing border-image-width"
michael@0:     return False
michael@0:   if not hasattr(props, 'slice'):
michael@0:     print "missing border-image-slice"
michael@0:     return False
michael@0:   if not hasattr(props, 'repeat') or (props.repeat not in ["stretch", "repeat", "round"]):
michael@0:     print "missing or incorrect border-image-repeat '" + props.repeat + "'"
michael@0:     return False
michael@0:   if not hasattr(props, 'outset'):
michael@0:     print "missing border-image-outset"
michael@0:     return False
michael@0: 
michael@0:   return True
michael@0: 
michael@0: def check_normalise(props):
michael@0:   if not hasattr(props, 'source'):
michael@0:     print "missing border-image-source"
michael@0:     return False
michael@0:   if not hasattr(props.size, 'width'):
michael@0:     print "missing width"
michael@0:     return False
michael@0:   if not hasattr(props.size, 'height'):
michael@0:     print "missing height"
michael@0:     return False
michael@0:   if not hasattr(props, 'slice'):
michael@0:     print "missing border-image-slice"
michael@0:     return False
michael@0:   if not hasattr(props, 'repeat') or (props.repeat not in ["stretch", "repeat", "round"]):
michael@0:     print "missing or incorrect border-image-repeat '" + props.repeat + "'"
michael@0:     return False
michael@0: 
michael@0:   return True
michael@0: 
michael@0: class Tile:
michael@0:   def __init__(self):
michael@0:     self.slice = Rect()
michael@0:     self.border_width = Rect()
michael@0: 
michael@0: # throughout, we will use arrays for nine-patches, the indices correspond thusly:
michael@0: # 0 1 2
michael@0: # 3 4 5
michael@0: # 6 7 8
michael@0: 
michael@0: # Compute the source tiles' slice and border-width sizes
michael@0: def make_src_tiles():
michael@0:   tiles = [Tile() for i in range(9)]
michael@0: 
michael@0:   rows = [range(3*i, 3*(i+1)) for i in range(3)]
michael@0:   cols = [[i, i+3, i+6] for i in range(3)]
michael@0: 
michael@0:   row_limits_slice = [0, props.slice[3], props.size.width - props.slice[1], props.size.width]
michael@0:   row_limits_width = [0, props.width[3], props.size.width - props.width[1], props.size.width]
michael@0:   for r in range(3):
michael@0:     for t in [tiles[i] for i in cols[r]]:
michael@0:       t.slice.x = row_limits_slice[r]
michael@0:       t.slice.x2 = row_limits_slice[r+1]
michael@0:       t.border_width.x = row_limits_width[r]
michael@0:       t.border_width.x2 = row_limits_width[r+1]
michael@0: 
michael@0:   col_limits_slice = [0, props.slice[0], props.size.height - props.slice[2], props.size.height]
michael@0:   col_limits_width = [0, props.width[0], props.size.height - props.width[2], props.size.height]
michael@0:   for c in range(3):
michael@0:     for t in [tiles[i] for i in rows[c]]:
michael@0:       t.slice.y = col_limits_slice[c]
michael@0:       t.slice.y2 = col_limits_slice[c+1]
michael@0:       t.border_width.y = col_limits_width[c]
michael@0:       t.border_width.y2 = col_limits_width[c+1]
michael@0: 
michael@0:   return tiles
michael@0: 
michael@0: def compute(props):
michael@0:   tiles = make_src_tiles()
michael@0: 
michael@0:   # corners scale easy
michael@0:   for t in [tiles[i] for i in [0, 2, 6, 8]]:
michael@0:     t.scale = Point(t.border_width.width()/t.slice.width(), t.border_width.height()/t.slice.height())
michael@0:   # edges are by their secondary dimension
michael@0:   for t in [tiles[i] for i in [1, 7]]:
michael@0:     t.scale = Point(t.border_width.height()/t.slice.height(), t.border_width.height()/t.slice.height())
michael@0:   for t in [tiles[i] for i in [3, 5]]:
michael@0:     t.scale = Point(t.border_width.width()/t.slice.width(), t.border_width.width()/t.slice.width())
michael@0:   # the middle is scaled by the factors for the top and left edges
michael@0:   tiles[4].scale = Point(tiles[1].scale.x, tiles[3].scale.y)
michael@0: 
michael@0:   # the size of a source tile for the middle section
michael@0:   src_tile_size = Size(tiles[4].slice.width()*tiles[4].scale.x, tiles[4].slice.height()*tiles[4].scale.y)
michael@0: 
michael@0:   # the size of a single destination tile in the central part
michael@0:   dest_tile_size = Size()
michael@0:   if props.repeat == "stretch":
michael@0:     dest_tile_size.width = tiles[4].border_width.width()
michael@0:     dest_tile_size.height = tiles[4].border_width.height()
michael@0:     for t in [tiles[i] for i in [1, 7]]:
michael@0:       t.scale.x = t.border_width.width()/t.slice.width()
michael@0:     for t in [tiles[i] for i in [3, 5]]:
michael@0:       t.scale.y = t.border_width.height()/t.slice.height()
michael@0:   elif props.repeat == "repeat":
michael@0:     dest_tile_size = src_tile_size
michael@0:   elif props.repeat == "round":
michael@0:     dest_tile_size.width = tiles[4].border_width.width() / math.ceil(tiles[4].border_width.width() / src_tile_size.width)
michael@0:     dest_tile_size.height = tiles[4].border_width.height() / math.ceil(tiles[4].border_width.height() / src_tile_size.height)
michael@0:     for t in [tiles[i] for i in [1, 4, 7]]:
michael@0:       t.scale.x = dest_tile_size.width/t.slice.width()
michael@0:     for t in [tiles[i] for i in [3, 4, 5]]:
michael@0:       t.scale.y = dest_tile_size.height/t.slice.height()
michael@0:   else:
michael@0:     print "Whoops, invalid border-image-repeat value"
michael@0: 
michael@0:   # catch overlapping slices. Its easier to deal with it here than to catch
michael@0:   # earlier and have to avoid all the divide by zeroes above
michael@0:   for t in tiles:
michael@0:     if t.slice.width() < 0:
michael@0:       t.scale.x = 0
michael@0:     if t.slice.height() < 0:
michael@0:       t.scale.y = 0
michael@0: 
michael@0:   tiles_h = int(math.ceil(tiles[4].border_width.width()/dest_tile_size.width)+2)
michael@0:   tiles_v = int(math.ceil(tiles[4].border_width.height()/dest_tile_size.height)+2)
michael@0: 
michael@0:   # if border-image-repeat: repeat, then we will later center the tiles, that
michael@0:   # means we need an extra tile for the two 'half' tiles at either end
michael@0:   if props.repeat == "repeat":
michael@0:     if tiles_h % 2 == 0:
michael@0:       tiles_h += 1
michael@0:     if tiles_v % 2 == 0:
michael@0:       tiles_v += 1
michael@0:   dest_tiles = [Tile() for i in range(tiles_h * tiles_v)]
michael@0: 
michael@0:   # corners
michael@0:   corners = [(0, 0), (tiles_h-1, 2), (tiles_v*(tiles_h-1), 6), (tiles_v*tiles_h-1, 8)]
michael@0:   for d,s in corners:
michael@0:     dest_tiles[d].size = Size(tiles[s].scale.x*props.size.width, tiles[s].scale.y*props.size.height)
michael@0:     dest_tiles[d].dest_size = Size(tiles[s].border_width.width(), tiles[s].border_width.height())
michael@0:   dest_tiles[0].offset                   = Point(0, 0)
michael@0:   dest_tiles[tiles_h-1].offset           = Point(tiles[2].border_width.width() - dest_tiles[tiles_h-1].size.width, 0)
michael@0:   dest_tiles[tiles_v*(tiles_h-1)].offset = Point(0, tiles[6].border_width.height() - dest_tiles[tiles_v*(tiles_h-1)].size.height)
michael@0:   dest_tiles[tiles_v*tiles_h-1].offset   = Point(tiles[8].border_width.width() - dest_tiles[tiles_h*tiles_v-1].size.width, tiles[8].border_width.height() - dest_tiles[tiles_h*tiles_v-1].size.height)
michael@0: 
michael@0:   # horizontal edges
michael@0:   for i in range(1, tiles_h-1):
michael@0:     dest_tiles[i].size                       = Size(tiles[1].scale.x*props.size.width, tiles[1].scale.y*props.size.height)
michael@0:     dest_tiles[(tiles_v-1)*tiles_h + i].size = Size(tiles[7].scale.x*props.size.width, tiles[7].scale.y*props.size.height)
michael@0:     dest_tiles[i].dest_size                       = Size(dest_tile_size.width, tiles[1].border_width.height())
michael@0:     dest_tiles[(tiles_v-1)*tiles_h + i].dest_size = Size(dest_tile_size.width, tiles[7].border_width.height())
michael@0:     dest_tiles[i].offset                       = Point(-tiles[1].scale.x*tiles[1].slice.x, -tiles[1].scale.y*tiles[1].slice.y)
michael@0:     dest_tiles[(tiles_v-1)*tiles_h + i].offset = Point(-tiles[7].scale.x*tiles[7].slice.x, -tiles[7].scale.y*tiles[7].slice.y)
michael@0: 
michael@0:   # vertical edges
michael@0:   for i in range(1, tiles_v-1):
michael@0:     dest_tiles[i*tiles_h].size       = Size(tiles[3].scale.x*props.size.width, tiles[3].scale.y*props.size.height)
michael@0:     dest_tiles[(i+1)*tiles_h-1].size = Size(tiles[5].scale.x*props.size.width, tiles[5].scale.y*props.size.height)
michael@0:     dest_tiles[i*tiles_h].dest_size       = Size(tiles[3].border_width.width(), dest_tile_size.height)
michael@0:     dest_tiles[(i+1)*tiles_h-1].dest_size = Size(tiles[5].border_width.width(), dest_tile_size.height)
michael@0:     dest_tiles[i*tiles_h].offset       = Point(-tiles[3].scale.x*tiles[3].slice.x, -tiles[3].scale.y*tiles[3].slice.y)
michael@0:     dest_tiles[(i+1)*tiles_h-1].offset = Point(-tiles[5].scale.x*tiles[5].slice.x, -tiles[5].scale.y*tiles[5].slice.y)
michael@0: 
michael@0:   # middle
michael@0:   for i in range(1, tiles_v-1):
michael@0:     for j in range(1, tiles_h-1):
michael@0:       dest_tiles[i*tiles_h+j].size = Size(tiles[4].scale.x*props.size.width, tiles[4].scale.y*props.size.height)
michael@0:       dest_tiles[i*tiles_h+j].offset = Point(-tiles[4].scale.x*tiles[4].slice.x, -tiles[4].scale.y*tiles[4].slice.y)
michael@0:       dest_tiles[i*tiles_h+j].dest_size = dest_tile_size
michael@0: 
michael@0:   # edge and middle tiles are centered with border-image-repeat: repeat
michael@0:   # we need to change the offset to take account of this and change the dest_size
michael@0:   # of the tiles at the sides of the edges if they are clipped
michael@0:   if props.repeat == "repeat":
michael@0:     diff_h = ((tiles_h-2)*dest_tile_size.width - tiles[4].border_width.width()) / 2
michael@0:     diff_v = ((tiles_v-2)*dest_tile_size.height - tiles[4].border_width.height()) / 2
michael@0:     for i in range(0, tiles_h):
michael@0:       dest_tiles[tiles_h + i].dest_size.height -= diff_v
michael@0:       dest_tiles[tiles_h + i].offset.y -= diff_v #* tiles[4].scale.y
michael@0:       dest_tiles[(tiles_v-2)*tiles_h + i].dest_size.height -= diff_v
michael@0:     for i in range(0, tiles_v):
michael@0:       dest_tiles[i*tiles_h + 1].dest_size.width -= diff_h
michael@0:       dest_tiles[i*tiles_h + 1].offset.x -= diff_h #* tiles[4].scale.x
michael@0:       dest_tiles[(i+1)*tiles_h-2].dest_size.width -= diff_h
michael@0: 
michael@0:   # output the table to simulate the border
michael@0:   print "<table>"
michael@0:   for i in range(tiles_h):
michael@0:     print "<col style=\"width: " + str(dest_tiles[i].dest_size.width) + "px;\">"
michael@0:   for i in range(tiles_v):
michael@0:     print "<tr style=\"height: " + str(dest_tiles[i*tiles_h].dest_size.height) + "px;\">"
michael@0:     for j in range(tiles_h):
michael@0:       width = dest_tiles[i*tiles_h+j].size.width
michael@0:       height = dest_tiles[i*tiles_h+j].size.height
michael@0:       # catch any tiles with negative widths/heights
michael@0:       # this happends when the total of the border-image-slices > borde drawing area
michael@0:       if width <= 0 or height <= 0:
michael@0:         print "  <td style=\"background: white;\"></td>"
michael@0:       else:
michael@0:         print "  <td style=\"background-image: " + props.source + "; background-size: " + str(width) + "px " + str(height) + "px; background-position: " + str(dest_tiles[i*tiles_h+j].offset.x) + "px " + str(dest_tiles[i*tiles_h+j].offset.y) + "px;\"></td>"
michael@0:     print "</tr>"
michael@0:   print "</table>"
michael@0: 
michael@0: 
michael@0: # start here
michael@0: args = sys.argv[1:]
michael@0: if len(args) == 0:
michael@0:   print "whoops: no source file"
michael@0:   exit(1)
michael@0: 
michael@0: 
michael@0: props = parse(args[0])
michael@0: if not check_parse(props):
michael@0:   print dir(props)
michael@0:   exit(1)
michael@0: props = normalise(props)
michael@0: if not check_normalise(props):
michael@0:   exit(1)
michael@0: compute(props)